Melting-furnace.



E. S DAVIS.

MELTING mamas,

APPLICATION FILED MAY 28,1912 I l fiafig htented. Nov. 26, 1911:.

2 SHEEYS--SHEET 1.

B S. DAVIS.

MELTING FURNACE.

APPLIOATION FILED MAY 28,1912. 7

-a- S I 9 (9 3 gym 52 Patented Nov. J), 101* 2 SHEETS SHEET I I l/l/IIM/AT r Ill/l/l/l/I/A 25 79 @W v i ED'WARD S. DAVIS, OF 'EVANSTON, ILLINOIS.

MELTING-FURNACE.

Specification of Letters Patent.

Patented Nov. 26, 1912.

Application filed may 28, 1912. Serial No. 700,165.

To all whom "it may concern:

Be it known that I, Enwano S. DAVIE}, a citizen of the United Estates, residing at Evanston, in the county of Cook and State of Illinois, have invented a new and useful Improvement in Melting-Furnaces, of which the following is a specification.

My invention relates to improvements in melting furnaces for use, more particularly, for melting non-ferrous metals and of the type known as tilting furnaces. Wherein provision is made for tilting the furnace during the operation of melting the metal to a position in which the base of its pouring-spout is uncovered, in order that the spout may be heated and thus prevent the metal from chilling when it is poured from the furnace through the spout.

Furnaces of this type as hitherto construeted present a number of disadvantages, chiefly among which is the necessity for the charging thereof at the top of the furnace, which i objectionable, especially as the furnaces are oftentimes of considerable height.

and thus elevated platforms are required thereon and spaced apart. and upon which to he used by the workmen in charging the furnaces, the workmen are thus required to I 9 on said frame. the lining 1 Work above the latter, and the pouring-floor and chargingfloor are not definitely separated, with the manifest objections. Furthermore, the shapes in which prior eonstructions of furnaces of this type have been provided are such as to prevent the use of standard formsnoi lining sections. and the method of heating employed is such as to prevent the securing of the maximum effectiveness of the fuel, and produces oxidation of the metal being operated on. to an 0bjectionable degree.

My object is to provide improvements in furnaces of the type above referred to to the l by a damper 17 provided with a handle 18 end of overcoming the above-stated objections, thereby reducing the cost of construction of the furnaces and re air and replacement of the linings thereo permitting the furnaces to be charged from a lower level than is possible as l'iitherto provided, and preferably at such a level as will permit the worknu-n to charge the furnaces from the floor, providing for the separation of the pouring-floor from the charging-floor, and diti i a rsecurtng greater eiiiciency IIOlIl the fuel I stud used without producing objectionable oxidation of the charge. Referring to the accompanying drawings--Figure 1 is a view in rear elevation of a furnace constructed in accordance with my invention. Fig. 2 is a section taken at the line 2 on Fig. 1, and viewed in the direction ofthe arrow. Fig. 3 is a section taken at the line 3 on Fig. 2, and viewed in the direction of the arrow; and Fig. 4, a broken plan section taken at the line 4 on Fig. 1, and viewed in the direction of the arrow.

The furnace proper is represented at 5 and is shown as formed, of a metal shell 6 of generally rectangular form lined, as represented at 7. with refractory brick to afford a melting chamber 8. The shell 6 is provided at opposite sides'with laterally projecting. lined. tubular extensions 9 forming hollow trunnions. upon which the furnace proper 5 is adapted to be supported. to be rocked back and forth. as hereinafter described. on a frame formed of a pair of standards 10 spaced apart and provided at their upper ends with rollers 11 journaled the furnace 5 is supported at its trunnions being so formed as to provide flaring openings 12 therethrough which communicate with the chamfor manual actuation thereof for the purpose hereina fter explained. the opening rep resented at 19 and througl'l which the furnace is charged with the metal to be melted, being located in the rear wall of the chamber8 and controlled by a door 20 hinged to the shell 6, as represented at 21 and adapted to be releasably held in closed conon by lugs 22 pivotally supported on s 23 secured to the furnace. As shown,

I the shell 6 is offset about the opening 19, and

- fractory material upwardly and downwardly, v .a reverberatory action of the flame in the the door 20 is lined on its inner side with rerepresented at 24, in order that the metal of said door shall not i be subjected to the intense heat: in the chamher 8.

lhe chamber 8 may be heated in any suitable manner, and by any suitable fuel. Oil as the fuel, however. is preferred, and in the drawings I have illustrated the furnace as adapted for use-with this kind of fuel. To this end it provide at opposite sides of the furnace air-blast pipes 25, Which extend at their open inner ends into the passages 13 in the trunnions, and pipes 26, leading from a supply (not shown) of suitable fuel oil, under pressure, and extending at their discharge ends into the open ends of the pipes 25. The arrangement of the burners thus provided at opposite sides of the furnace causes jets of flame to be introduced into the chamber 8 from opposite sides thereof, the oppositely-directed jets of flame meeting at substantially the center. of the chamber 8 and by their impingement against each other deflecting the flame both thus producing will chamber, whereby the metal charged therein, as hereinafter described, is highly heated to melt it without undue oxidation thereof. The operation of the furnace is as follows: As is the common practice in operating furnaces of this type, the metal to be melted. is introduced into the chamber 8 in small quantities from time to time as the melting progresses, until the chamber 8 is charged with. the requisite quantity of metal. After each successive charging, as stated, the furnace is tilted on its trunnions 9, as by means of a hand-wheel 27 fixed on a shaft 28 journaled on oneof the uprights l0 and carrying a bev'el pinion 29 meshing with a similar pinion 30 fixed on a shaft- 31 carrying a worm 3:2 meshing with a Worm wheel 33 secured to one of the trunnions, to cause the lower end of the spout .14 to be uncovered by the metal charged into the chamber and thus permit the flame in the latter to discharge through the spout to heat it, in order that the metal, While being poured from the furnace, shall not be chilled. The furnace is charged with the metal to be melted, as stated, through the opening 19, the operator, previous to each charging operation, tilting the furnace back to horizontal position and opening the damper 17 to cause the flame and gases to vent from the chamber 8 while charging takes place. .lt is desirable in the manufacture of certain alloys that the metal in molten condition be paddled, and to permit this to be done conveniently I provide an opening 34 n the front wall of tht chamber 8, controlled by a hinged door through which opening the operator may introduce a suit able pudrlling tool into the furnace for the purpose stated.

The advantages of my improved furnace be manifest. Th provision of the chargirig-opening if) in the rear wall of the chamber 8 enables the workmen to charge the latter with metal by standing on the floor on which the furnace is supported, and without requiring them to stand over the furnace, and furthermore widely separates the charging-thaw from the pouring-floor. The provision of the rectangular-shaped shell permits of the lining thereof with brick of standard shapes, thereby minimizing the cost of construction of the furnace and facilitating and cheapening renewals and repairs; and the provision of the opposed burners, as stated, serves to produce the requisite heat in the chamber 8 Without inducing oxidation of the metal and depositing of carbon upon the Walls of the chamber.

What I claim as new and desire to secure by letters Patent isl. In a furnace, the combination with a support, of a melting-chamber trunnioned on said support to be tiltable thereon and provided with a pouring-spout at one side, a charging-opening in another side thereof, and a vent, for the purpose set forth.

2. In a furnace, the combination with a support, of amelting-chamber trunnioned on said support to be tiltable thereon and provided with a pouring-spout at one side, a charging opening in its opposite side, and a vent, for the purpose setforth.

In a furnace, the combination with a support, of a melting-chamber trunnioned on said support to' be tiltable thereon and provided with a pouring-spout at one side, a charging-opening in another side thereof, an a vent in its top, for the purpose set forth.

4'. In a furnace, the combination with a support, of a. melting-chamber trunnioned on said support to be tiltable thereon and provided with a pouring-spout at one-side, a charging-opening in its opposite side, and a vent in its top, for the purpose set forth.

5. in a furnace, the combination with a support, of a melting-chamber trunnioned on said support to he tiltable thereon and formed of a shell of rectangular shape lined with refractory material, said chamber being' provided with a pouring-spout and containing a charging-opening, the floor of said chamber being transversely concaved, for the purpose set forth.

6. In a furnace, the combination with a support, of a tnelting chamber trunnioncd on said support and tiltable thereon, said chain cpmprising an outer shell lined with rdi'ractory material and containinga damper in its top, a charging-opening in a side thereof, a removable closure for said of for impingement against each other, said opening, a pouring-spout for said chamber chamber containing a puddlingopening in 10 in the wull thereof opposite to that c0nt21ina will) thereof, for the purpose set forth.

ing said charging-opening, 51nd fuel burnefs WA 1 7 extending Into, suld trunnlons at opposite RD S DAQIIS sides of said chamber and connnumcatlng In the presence of- \Vlfh the latter for lnt-roducmg ets of flame lw'uLmc B. DEARBQRN,

into said chamber frmn opposite sides thereg RALPH A. SCHAEFER. 

